Operation Serval was the coordinated invasion of the Centrality by Darth Krayt's Galactic Empire in 138 ABY, prompted by the Centrans' covert support of the Galactic Alliance Remnant. After a century of hiding, the One Sith dark side group came out of hiding to launch an attack in conjunction with the Fel Empire on the Galactic Federation of Free Alliances controlling much of the galaxy. The Sith then split from the Fel Empire in 130 ABY and forced both GFFA and Fel remnants to the Outer Rim Territories and Wild Space by 137 ABY. At this point, the Sith leadership attempted to isolate the resistance groups from their supply sources by convening a diplomatic meeting on the planet Mon Calamari to enforce a policy of no commerce with the Galactic Alliance Remnant and the Fel Empire.